Control valve device



April 23, 1946.` A. J. BENT CONTROL VALVE DEVICE Filed Jan. v29, 1944 LULLPRESSUHE INVENTOR ARTHURJBENT BY dm ALTTORNE Y 46 45 fea 5 5 p q 1 l M a am 2&2 N z 2% 0 01 /o m wwwwmm m W a .l 67 E 0162 3. mul ra Ill/(ln 777 72678 M733 6 EN, |||ll E :wrldl ,w Vooam M 0.1068012 20.1 0 E |V wwmwlHoo 5%@ 7%22% .MW EO @JET Lw aM/2 EO 3033 M Patented Apr. 23, 1946 UNITED STATESPATENT. OFFICE CONTROL VALVE DEVICE Arthur J. Bent, Wiuansburga., assigner te The Westinghouse Air Brake Company, 'Wilmerf ding, Pa., a corporation of lpelmsylvania Application January 29, 194i', serial No. 520,289

as claims. (ci. soa-54) y Y Y Affurther object of the invention is to provide This invention relates to control valve devices ,ofthe selfflapping type for use in controlling -I":tiuid pressure systems and more particularly to a self-lapping control valve device for use in a .p fluid pressure airplane control system. 1;! Valve devices employed in iiuid pressure airplane control systems mustof necessity be light device of the above mentioned type which is very sensitive to variations in fluid pressure in controlling the supply of fluid under pressure to and the release of fluid under pressure from a Van improved self-lapping type control valve control pipe and which is consequently operative to provide any desired control pipe pressure quickly and accurately. Y Another object of the invention is to provide a control valve device having the handle or Vactuating portion thereof readily adjustable to any vchosen position about its axis relative to the body fof the device and whereby the actuating portion when positioned may Vbe rigidly locked in place; in other words, to provide a control valve device fhaving an actuating lever portion which may be @readily adjustable to any chosen position in a iicomplete circle about its axis without, in any way, affecting any other part or parts of the device.

By reason of this novel arrangement the casing of the device may, without regard to the position of the handle, be secured in any suitable posi# tion, after which the handle portion may be readily moved to and locked in the most suitable operating position. Thus the valve device as a whole may be adjusted to suit different mounting conditions without in any way affecting the proper operation of the device.

Still another object of the invention is to provide a control valve device of the above mentioned type having improved and novel means formaintaining the operating handle thereof in any control position to which it is moved, against accidental movement to any other control posit tion. According to this object friction means is providedfwhich is readily adjustable by theoperator, to the desired degree suiiicient to resist any tendency of the operating handle to move accidentally from any control position to which it liasbeenmoved.

a kcontrol Valve device .of the above mentioned typehaving means for vattaining and maintaining any chosen predetermined control pressure when the operating lhandle thereof is disposed in a given position. According to this object, novel adjusting means is provided for regulating the valve mechanism of the control Valve device so as to vary the pressure graduating range between any predetermined chosenminimum and maximum pressures in accordance with the position of `the `operating handle in a variable pressure zone.- M

Aiurther object of the invention is to provide a control valve device arranged` to be controlled 'either by duid under pressure or by manually operative means.

A still further object of the invention is to provide a control valve device arranged to be controlled by fluid under pressure or jointly by fluid under pressure and manually.

`Still another object `of the invention is to provide a control valve device arranged to be controlled by` fluid under pressure from a remote control station and having means manually operative from a local station for modifying or varying the pressure of fluid supplied by the device.

Other objects and advantages will appear in the following more detailed description of the invention. l l

.In the accompanying drawing Fig. 1 is a vertical sectional view through a control valve device constructed in accordance with the invention, the device being shown twice its actual size for the sake of clarity, Fig. 2 is a cross sectional View through the device and taken on the line 2 of Figi; and Fig-3` is a cross sectional detail view of a portion of the device taken` on the line 3-f3 of Fig. 1.

As shown in the accompanying drawing, the control valve device l 'may comprise an upper body casing 2 and a lower body casing 3 which are secured together in any suitable manner, such for instance, as bolts 4 and nuts 5.

A flexible diaphragm 6 is clamped around its edge between the upper and lower body casings 2 and il, respectively. At one side of the dia phragm 6 there is a chamber 1 which is in constant open communication with a pipe 8 leading to atmosphere and at the oppositeside of the diaphragm 6 there is achamber 9.

Contained in chamber 9 and engaging a wear plate |0 preferably moulded into diaphragm 6 is a' diaphragm follower I2. This diaphragm, fol

projecting shelf or ledge I 9 which is provided with a groove or recess in which there is contained a sealing ring 2l. of the groove 2G and the outer wall of a sleeve like portion 22, which extends'upwardly" from the This ring contactsthe'bottom follower l2, for preventing uncontrolled flow off ,-f

fluid under pressure between chamber 9 below said ring and a chamber'23v above said ring. Chambers 9 and 23 are, however, in permanent open communication with each other through a passage 240irestricted ilow area, provided' lin followerV i2, for a purpose' hereinafter described. Chambers 23! and Bare therefore in constant open communication with a control pipe 25 by' Way of a passage 2,6 provided i'r'i--th'ev upper body casing 2. i The di'aphragmfollower' l2 is provided with afcentralA bore 2 which-connects with an axial aligned bore 28 provided in a downwardly projecting-'stem 2i)Y projecting from the follower I4'. The bore 2l at its upper end is lined, for a portion of itslength, with abushing 30l is provided at its upperiend with a collar3l. This collar engages a stop shoulder 32 pro-vided on the follower, and insures the proper positioning of the bushing Se. yThis bushing is. also `provided with a valve seat'35 whichffis adapted to be engaged by a main release valve 35 for closing communication between the inside ofthe sleeve like portionf22, which isopen at its upper end to chamber .23, and. bore 28 in the sternv of the follower It. Thislfmain. release-valve isprovided with a downward fluted/ste'm 31 which projects into and isrslidably guided by the bushing` 30.

Also contained in sleeve like portion 22 is apilotrelease valvet' which is adapted to seat onl a valve seat '39 provided; on; .the main release valve Se... Thisipilot Vvalvexis also operative to control communication Vfrom .the inside' ofi .sleeve like portion 22 andftherebychamber 23 to thebore 28 in the stem 29 of the follower I4 in. a manner hereinafter described. The pilot release valve 38 is. provided with astem 40 which pro'- jects: downwardly, beyondA the. endv of the main releaseY valve fiuted stern 3:1V lthrough a central bored! in the main release valve stem 3l'.`

Extending upwardly from the upper surface ofthe main release valve andpreferably formed integral therewith.. is a semi-circular rib 36a which,v at its upper end, is provided with a laterally disposed forked portion 35h which extends in the directionrtoward the axis of the valve, the space between thisforked portionA and the upper surface of the valve being provided for the accommodation of 'a portion of a supply valve member that will be described later.

Contained in bore 28 and engaging the lower endfofthe pilot release valve stem 40 is a vertically movable'fspringseat 42 which is maintained l in engagement with the stem by a spring 43 inter'- aeeasv'r z by way of a passage 48 provided in the casing 3` is in constant open communication with a pipe 41: leading to the atmosphere. Slidably mounted at one end in bore 28 of the diaphragm follower 'le and at its opposite end in bore 46 of the boss 4.5 is a floating member 50 having a central through passage 5l for establishing communication: between-` bore 28 and bore 45 and thereby passage 48. The' floating member 55 at its upper end is provided with an enlargedexterior portion15'3 inthe form of. a portion of a spherel which portion may slidablyand rockably engage .the wall. of the bore 28 in the follower stem, 29. The' lowerend of the iioating member isprovided with a similarspherical portion 55 which may slidably and rockably engage the wall of the` bore 46 in the-*boss 45. It will thus be seen .that theV connectionszbetween the floating member 5i! andthe followenIZ and boss 45 are such as Yto permit universal movement'between the partsjsoY as Vto eliminate any possibility of binding action being set-upbetween the follower and the member due' to, cooking of the diaphragm 5 and, follower assemblage.

The upper and lowerf-portions153-and 55. of the member 50 are provided-withV grooves .or recesses- 56 and 5'I, respectively. Contained in grooves Stand 5FI are sealing rings 58 and 59, respectively, each ring contacting the bottom-'of the groove or recess in which it is disposed and the wall of the bore withV which it is' associated. These rings prevent leakage o f fluid under pressurepast either end of the member to chamber 'I.

Contained in chamber 'I and interposed'between. and operatively engaginrgha. spring seat 62, preferably mouldedinto thelower face of the diaphragm follower I 4 and a. spring `seat- 63; vcarried by the bottomv inner wall of the vcasing 3 is a spring. 64. This 'springis opera-tiveto oppose downwardinovement of theY diaphragm assemblage, including follower I4,diaphragm; 6- and diaphragm. follower I2, from. the position in which it is shown in Fig.` 1 of the drawing, as will be later described. v

The upper body casing 2 is provided with a central` bore t6 which VKat itsl lower'end is open to chamber A23 and which atits' upper end. is open to the lower end of acounterbore ('I which is connected to chamber :23' by wayof* a passage 68. Slidably mounted. in this bore is a plunger 69 having a central bore 'lil which opens through a valve seat TI, providedv adjacent the lower end thereof. -This valve seat is provided for engagement by a main supply valve 'I2 disposed. in bore 1U. This main supply valve is provided with a fluted stem T3' which extends downwardly through the'bore 'l0 below the valve seat 'II and is provided with an extension 'III which. projects into chamber 23. The extension 'I4 at its lower end isl provided with an enlarged annular portion 'I5Y having an exterior groove or recess 'I6 which is adapted to loosely receive Athe forked portion 36h of themain release valve 36. thus operatively connecting the main release valve '36 to the main supply valve 12.

It should here be mentioned that there is clearance between the inner edgesurface of the forked portion 36h of the .main release valve and the bottom'of the groove 16 as well as between the Vagainst the setting jup of binding action between the valves and their bushing and between the valves themselves in the event of any unwanted cockingof the diaphragm and follower assemblage.u'lfhus the proper seating .and unseating ot the valves is insured and possible damage :due tothe cooking of the diaphragm andfollower assemblage is eliminated. a i l The main supply-valve is provided with a pilot supply valve seat 18 forvengagement with a pilot supply valve 19. The pilot supply. va1ve 19 is provided with a stem 80 which extends through a central bore 8| in the main. supply valve stem and at its end engages the top of the pilot release valve 38. i Interposed between the pilot supply valve 19 and a spring seat member 82 provided on the lower enlarged end portion of an operating stem 94 is a spring 65 which tends, at allv times, to

-urge the pilot supply 19into engagement with rits seat'13. The operatingstem 84 is, as shown inFig. 1 of the drawing, operatively connected to the upper end of theplunger 69 by means of a pin 86. The enlarged end of the stern isalso provided witha groove or recess |38` containing an annular sealing ring or gasket 89, which contactsthe bottom of thegro'ove and theA inner wall" of the plunger for Vpreventingfleakage of fluid under pressurefrom bore 10 to the counterbore' 61.l i f Bore 1|)v within the plunger 69'is in permanent open' communication 'through aplurality offports 90, providedin-the wall of the plunger, with a chamber9| provided in body casing 2 above chamber 23. Chamber 9| surrounds a portion of vthe plunger 69 and is in constant open communication by way of a passage 92 with a pipe "93 leading to a source of fluid yunderv pres- V's ure, not shown. The casingi section 2, interme-` diate'chambers 23 and 9|, is provided with a recess orV groove 95a containing a sealing ring or gasket 96a. which `contacts the bottom of the groove, andthe outer wall of the plunger for preventing leakage of fluid under pressure along the wall of the plunger from chamber 9| above the gasket to chamber'23 below said gasket. The casing section 2` is also'provided, intermediate chamberl 9| andcounterbore 61, with a recess or groove 95 containing a sealing ring or` gasket 96 which contact the bottom of the groovel and the outer wall of the'plunger for preventing leakage of Aiiuid under pressure along said plunger from chamber 9| below the gasketto the counterbore`61 above the gasket. i

' TheU operating stem 84 extends upwardly through a central opening in Ka guide member 91iv'vhich'` rests on thel upper end ofthe body casingand'closesthe upper end ofthe counterbore 61; This rmember is provided Vwith a recess '98 containing'asealing ring 99 which contacts the bottom of the recess and the stem V81| to prevent leakage of'uid under pressure from the counterborefand along'the'stem to the atmosphere.`

" Thetopiface of casing'jsection 2 is provided withj alrecess i containing a. gasket f |'0 I which contacts thejbottomof theirecess and the under side oigan' `amnilarflange l 02 Lc'arri'edby the guide body casing 2. i l isprovided with a plurality of holes I|0 through portion I 20.

member 91 for preventing leakage of uid under pressure from the counterbore 61 to the atmosphere between the top of the body casing 2 and the member when the member is clamped in position.` M

Above the body` casing 2 there is an operating handle support member `|03 comprising an upper part |04 and a lowerpart |05 which lower; part isprovided with a suitable opening |06 for accommodating the operating stem84. The lower part |05 is clamped in` position on top o f the guidemember 91 by meansof a flangel member |01 rigidly `secured to this part of the handle supportmember and a nut |09 having screwthreadedengaggment with the upper end of the The nut |09 at its lower end any one o f which a Wire III carried by the casing section 2 may be threaded, as shown in Fig. 1,

for lockingthe nut in position. o Rotatably mounted in the handle support member |03 is a shaft |I5having a suitable opening IIE arranged ,to .accommodate an adjusting nut I1Vanda lock nut II8 whichare screwthreaded on the stem 84, the adjusting nut constituting', in effect, an extension of the stem 84. Y Y

Carriedby the shaft ||5 and locatedat one side of the axis thereof and extending across `the opening` IIB therein and through the' slot |23 of the adjusting nut |I1, is an adjusting memberl 11 which is rockable relative to the shaft for moving the adjusting nut and associated parts vertically relative to the handle support member `|03 to effect certain adjustments which will be later described. This adjusting member comprises a screw-threaded Aportion |20 vwhich has screw-threaded connection with thatportion of the shaft which denes one side of the opening I'|6 and further comprises aiportion |22 which is integral with the portion |20 and which extends from the end of portion |20 in a direction across `the opening II6 and into the slot |23 of the adjusting nut I |1.` The diameter of the portion |22 is less than that of portion |20 andlits axis is offset fromthe axis of the portion `|26. IntegralV with the portion |22 and extending` from the end thereof intothat portion of the shaft I5 dening the other side of the opening |I`6 a portion |24 which is of less diameter than the portion |22 and which is axially aligned with the From the foregoing description it vwill be understood that when the member 1 1 is Vrocked in oneV direction the portion |22 thereof .will move the adjusting nut `and attached parts upwardly relative to the xed parts of the casing and that when it is rocked in the opposite direction it will move the adjusting nut and associated parts downwardly. The member when it is thus rocked will, due to its screwthreaded connection with the shaft movein the direction of its length but such movement will be of no consequence.` f

The upper part |04 of the handle support member |03 is provided with an opening |25 through which oneend of an operating handle |26 passes, which handle is operatively connected to the shaft I|5bymeanslofapin |21. The upper part |04 of the handle supporting member is hinged at one side to the lower part |05 of the member by means of a pivot pin |30 and is maintained in frictional engagement with theshaft `I|5 bymeans of a mechanism comprising a spring I3 I, a spring seat |32 and a bolt |33 which extends `through aligned openings @mdia if?? Pelham and" |5 :Triggering vIii-I -is interposed ybetween 1a spring seat 4 Ilaprovided on the lower part :Ifof the 'handle support member vand the .spring Aseat 1F32 located below. the spring seat `I05a.'1*hespring seat T132 has screwthread engagement with the lower end lof the bolt ISS. At is'lupper endlthelbo'lt Lis provided with a head which engages the-upper .part'PI-Bll `of the. member. -lrom this it 4will be understood that the spring acts through the -mediume the bolt and-part IM to .frictionally -load 'the 'shaft to -preventfany unwanted movementthereof from any position to whichit'hasbeen movedfft will be understood thatv by turning the 'screw or the spring seat relative to Etheother the i-rictionafl Aresistance to rotation 'of the shaft Lmay :be increased ori-decreasedasdesired. Y Y

I-f at anytime itis desiredv to change ithe-'direc'- tion of-*operation-of the operating handle I'2fIi the wire I II is withdrawn from the opening VIIIMand then the nut I9 v's'laclfred 4back or :loosened so as to vrelease `the handle support member 193. V"-Ihe member |163 can now ibs-rotated about its axis relative 'to lthe body casing 2 to the new'oh'osen position. When `the handle support member is thus positioned, the nut l is turned down, clamping said member Arigidly 4.in^y. osition and the nut isthen locked vin place Vby 'the wirev vIH It will be understood-that 'adjustment of the handle support member ID3 relative to the body `casing 2 may be made without in any `way 4affecting the operating parts of the device, sincethe connected operating stem l84 and thereby the plunger '69 is free to rotate relative tothe main supply valve 'I8 when the member I'03 is moved relative to the body casing 2. The handle support 4member can be vmoved through 360 relative tothe casing of the device so'that regardless of the position i-n which the'casing is mounted the member can be 'positioned to provide for operation of the op; erating handle in the desired direction. n

It should here be understood that by disengag-l Y ing the lnut 199 from the casing the handle support member I'03 and-the connected plunger 69 plus the supply :and release Valve assemblage may be removed from the body casing Yasa unit, thus permitting either of the valves to rbeserviced or replaced. This feature also renders it easy and convenient 'to replace the sealing vrings associated with'the unit. Y

Adjust-ing the control @aloe jor operation When it is desired to obtain some predetermined pressure, lsuch for instance as seventy pounds, in the-control pipe 25a-nd thereby "in the connected chambers 23 and 9 of the control 'valve device I `upon kmovement of .the operating handle '|26 to its maximum pressure position vand zero pressurein the control pipe and connected charn-y be'rs uponmovement oisai'd 'handle to its release position, the handle is iirst moved vfrom .its .re-

Y lease position in which it is shown inthe d rawing to its maximum pressure position in Awhich it engagesthe right-hand end ofthe slotted opening in thev upper part IM of the handle support member. With the handle in this position the lock'nut |35 on the screw portion |20 of 'the ad: justing member I'I is loosened and a screw driver or the like inserted in a slot |36 provided in the end of the screw and the screw rotated in V.either a clockwise or counterclockv'vise. direction relative to the shaft H9 'until the desiredV chosen predetermined pressure is attained in chambersVv 9 .and 23 and thereby 'in the control'pipe `25; 'the ,eccentric portion 122'1of the adjusting member TI co operating with 'the adjusting'nut 'I 1:1 Within the 'spesi-size slottedopening :12B itofeiectoperation offthe sup'- y v Vply iand release valve `as will Poe hereinafter -"hilly described. 5I-t should `here be mentioned that 'the rusual :pressure gage l(not shown) located inthe u'id `pressure system v`'at 'the -operatorls ystation will indicatel when this lpressure is attained.

rWhen the chosen Apredetermined pressure Eis thus attained iin said chambers 'and r*control pipe 25,"the nut I35 s-rotated "into engagement with the shatII ythus locking the adjusting screw '|20 and thereby Athe eccentric portion 122 ofthe screw iin its `adjusted* position 'in the Yslotted lopening 1"|23 lthenut IFI. With the eccentric 'portioniIZtl-ius `locked in vposition it ywill a'ct as the medium through which -force will be transmitted from the shaft IIE to the nut lIII and thereby 'to the :operating stem 84 and 'plunger' operating handle AVI2'6is then -moved :in a clockwise direction from `its maximum pressure position through a variablepressure zone to thepos'ition in which 'it is-shown the drawing, i. Ie., its 'release position in which said lhandle engages Nthe left hand end of the opening |25, With the operating handle lin th-is position the 'control pipe pressures'hould decrease, such -decrease being registered by theherei-nbefore mentioned-pressure gage.Y If there -isnotv'a suicient lreduction .inthe pressure Aof fuidin ythe Icontrol *pipe 25 upon return of the operating :handle toits release positionjithe supply of -fluid under *pressure tofthe control Ivalve device `is -cut off vby the operator .and adjusting "member I"I removed, lafter which the nut 109 is iloosened and the handle support `Vmember jI 03 removed. With the handlesupportmember removed, lock nut I I8 on the stem 84 .is'l'ons-A ened 1after which the member 'lr03 is replaced and the nut I09 tightened to a degree suicie'ntto hold the member |03 in place, but not ,so tight as 'to prevent the member from being rotated vrelativetothebody casing '2. With'the handle supportuneniber thus assembled'the adjusting member I1 is replaced and the handle support'member rotated in a clockwise 'direction relative to the 'body casing 2 until a decrease in the pressure of uid in the control pipe "is registered on Vvthe aforementioned pressure gage, the release of fluid under pressure from the control ppebeing by wayfof arcircuit hereinafter traced. "It willbe Y. understoodthat since the lock nut 'I I8 is out of engagementwith 'adjusting nut I I1, clockwise rotation of "the handle support `member 103 and thereby the adjusting nut I'I 'I through the medium of adjusting member 'I'Iw'ill Ycause :the plunger B9 to move upwardly. This 'upward movement of vthe plunger acting .through the main ysupply valve seat 'I'I :moves the main supply valve 'l2 and 'the pilot supply valve 19 ,in the same direction, thus .permitting the spring 43 acting through the medium ,of'stem'd 'to unseat .the pilot release va1ve38 and continued upward movement of .the main supply valve will cause the .connected main release valve 36 to move out lof engagement with its seat 35. With the plunger .69 and thereby the .supply and release' valve assemblage thus conditioned the adjusting member. .'IIV 'is removed and the nut 'I'ILI loosened to permitremoval of handle support member 103, after which'the locknut 1I ,It 1s tightened into engagementwith 'the `adjusting nut I 1.1 for 'locking 'it in its adjusted position. ',When Ithe adjusting nut is 'thus locked in 'its `adjusted position, the handle supportmem'ber ID3 .lsrotated ato the vdesired position ;for operation offthe han-' dle 1126 and 'then clamped ln place by thent 199,

which nut visl then "locked 'in place 'by wire I'II.

The adjustingmember 11 is then repositioned in the shaft and locked in place by thelock nut |35. It will be understood that when the -operating handle |26 is moved to its full pressure position a repetition of the adjustment made by the adjusting member 11 may be required to attain the desired maximum pressure.

It will be understood from the foregoing that the4 adjusting member 11 is operative to adjust the pressure range Vbetween 'some predetermined chosen 'minimum and maximum pressure and that. the adjusting nut ||1 is operative to adjust the plunger' and thereby a mechanism to attain the desired initial pressurein the control pipe when the handle |26' is positioned in its release position.

S If it is desired to maintain some predetermined chosen pressure such for instance eightypounds in the control'pipe 25 and connected valve chambers .9 and 23, respectively, when the operating handle( |26 is in its release position andto at'- tainfsome maximum pressure, such for instance as'orie hundred fifty pounds, in the controlpipe when the handle is moved to full pressureposition, the adjustment to obtain the initial pressure may be' madeV first by adjusting nut |`|1 after pounds pressure'per square inch when the handle is returned to full release position, i. e., the position in which the handle is shown in the drawing. When the handle' is moved in the variable'pressure control zone between the -release position and the full pressure position,` the pressure in the control pipe will be varied between eighty and one hundred iifty pounds in accordance with the position of the handle.

Operation Assuming that pipe 8 and thereby chamber 1 is open to the 'atmosphere and that the several parts of the control valve device areproperly adjusted and positioned as shown in the` accompanyirig drawing, the plunger`69 will bein the position shown so that the main release valve 36 will be in engagement with its seat while spring 43 acting on the end of the pilot release valve stem will maintain the pilot release valve unseated, and spring will-maintain the main an'dpilot supply valves 12 and 19, respectively, seated. With the main vandpilc'itsupply 'valves 12 and 19 thus maintained seated, communication between the bore 10 inside of the plunger 69 and thereby the connectedchamber 91 and chamber 23 is closed. With the pilot` release valve 3 8 unseated, communication between chamber 23, A connected chamber 9 and control' pipe 26 and theiatmosphere'is established pastsaid valve, through a passage |46 in the main release valve 36, iiuted stem 31 of the main release valve`36, bore 28,111 the diaphragm follower stern 29; a passage |4| in wall or rib 44, passage 5l in floating member 50, passage 48 and pipe 41. y l

If, when the fluid pressure supply `pipe V9% and thereby chamber 9| and b ore 10 within the plungier 6 9, is charged with fluid under pressure and it is desired to supply fluid under pressure to the control pipe 25, the operating handle|26 of the control valve device is rotated in a clockwise di# rection from the position-in'whichit is shown, causing the shaft `I |5to rotate-intheisamedi-` rection. Since the adjusting member11 is carried by Vsaid shaft and the eccentrically arranged portion |22 kof the'member engagesthe nut||1 within slotted `opening n123,r the plunger; 691v is caused to move downwardly fromthe position in which itis shown inthe drawing. The spring 63 acting on the lower end ofthe pilot release valve stem 49 is considerably lighter than spring 85 acting on the pilot supply valve 19,'softhat downward movementof the plunger 69, acting through the medium'` of spring 85,`fp ilot supply valve19 and pilot supplyvalve stem 80, causes the pilot release valve 381th move into engagement with its seat on the main release valve 36against the opposing pressure of spring 43. With the pilot release valve thus seated, communication between chamber 23 and the` Aatmosphere vthrough the circuit hereinbefore traced'will loecloseil.` fi

Upon movement of the -pilot`release valve`-38 into engagement with its} sea't'39 said valvebe'- comes stationary; so' that "continued downward movement ofthe-.plunger 6 9perm its the-main supply valve to move 'downwardlyawayfroni the pilot supply valve 19 so that a communication is established between the b ore 16 and chamber 23 by way of a passage 1 I a provided "in the* main supply valve 12, Fluid under pressure will now flow from bore 10 'in plunger 69 and connected chamber 9| past valve 19 at a restricted rate Yto; chamber 23 from whence it flows to the control pipe 25 by way of passage 26: Fluid under pressure supplied to chamber 23 flowsfthrough passage 24 in the diaphragm follower 2 at arestricted rate to chamber 9 above thediaphragm 6. The rate of flowV of uid under pressure through passage 24 is suchas to preventthe pressure in diaphragm chamber 9',increas ing faster than that ofthe pressure in the control p ip'e 2,;5. Fluid under pressure supplied to chamber 2 3 also flows through passage 68` to c ounterbore 6 1 and acts on the upper surface of theplunger 69,

thus balancing the iiuid pressure force'acting on opposite endslof said plun'gerjsoV thatjth'e' 'fp pcg required to eifectoperation ofthe nandlewijl b g reducedto a minimum, 1 Y

Continued downward movement ofthe plunger 69 permits the upper wall |42 of the 1'e` c'ess .to` engage withthe uppersurface of the forked pori tion 36h carried by the main `release valve3S,' so

that the main V`s1 1pply' valve 'l2` is brought to 'a stop. When this cccursgthe plunger moves downwardly relative to the main supply valve` l2 thus y movingv the main supply valve seat 1| out y of 1e r ij gagement with the valve so, that acommunication y. of"relatively large ilow area is established he' tween the bore Illinsidetheplunger 69and Cham? ber "23. With this communication'established] be; tween bore 10 and chamber 2 3, fluid underpressure flows from b'ore 1 0 `and connected supply chamberl to chamber 23 and thereby chamber 9 and control pipe 25 at an increasedirate", It should here be understoodthat ifonly'a slight increase in pressure is desired in the. controlpipe 2 5, only the 'pilot supply valve 19j will be; une seated; while if a large increase in fluid under pressure is required in the control pipe, both the pilot and main supply valve will be unseated. 4I By this' arrangement it will be seen that the control valve device is` operativeto provide any desired control pipe pressure quickly and'accuraifelyi"L4 The pressure of fluid suppliedft'o 4chamber" 9 acts en iiaphragm eiopppositiontothe; forebf eontrol spring 64, and when this-pressure is in` eontrol pipetas, andassociatea chambers s and z3 will occur, the spring `4II` maintaining the. pilot .release valve 38 unseated as shown in the drawing. i

From the 4foregoing description `in.y connection with adjustingthe control valve devicefor operation, it will be understood that if desired, the control valve 'device may be adjustedto maintain a certain predetermined'pressure, such for instance as eighty pounds, in the control pipe when the operating handle I2E is in its release position and operative to obtain some predetermined pressure such for instance one-hundred fifty pounds when the handle ,is movedto its maximum pressure position. If the control valve device has been adjusted to maintain some predetermined chosen pressure when the operating handle is moved to release position the pilotrelease valve 38 will be seated so that all valves will be closed and the desired pressure will be maintained inthe control pipe and associated chambers. Itwill here be understood that when the control .valve deviceis so adjusted, the predetermined chosen pressure inthe control pipe and chamber 9 will `cause the diaphragm 6 todefiect downwardly against the opposing pressure -of spring 64 so that the follower? I2 willnot be in the position in which it is shown in the drawing, but will be `moved downwardly out-r of engagement with theoasingw .i v

To effect a further increase in fluid under presn sure inthe control pipe 25, the handle |26 of the control valve device is moved ina clockwise direction from` its release position and the plunger 69 and the supply and release valve mechanism will operate in the same manner as before described toy increase the control pipe pressure, it being understood that upon movement of the handle into its full pressure position themaximum control pipe pressure will be attained.

. If, after the control pipe pressure has been in'- creased to some degree above the predetermined choseninitial control pipe pressure, it is desired to reduce the, pressure inthe control pipe, the handle is moved counterclockwise and the plunger and valve mechanism will operate to reduce' the pressure. It will of course be understood that when the handle is moved to the release position the predetermined chosen initial pressure will .be

maintained in the control pipe. Y

From the foregoing description it will be understood thatthev control pipe pressure may be increased or `reduced in as many steps or increments as desired, thevdegree .of each step depending upon the extent of the clockwiseor counterclockwise rotary movement of the operating handle in the variable pressure zone. It will also be understood that the control valve device may be adjusted to completelyl vent the-fluid pressure from the controlpipe ormaintain some predetermined pressure in the control pipe when the handle is moved to its release position. i

In theforegoing the spring control-chamber] of the control valvevdevice I has been described as being in open communication` with the atmosphere, but it is to be understood that uid under pressure may be supplied to and released from this chamber when it is desired to control the device by fluid under pressure.` Y

LAIn `some fluid pressuresystems such as employed for controlling airplanes and ships it has been found desirable to` control the system from two stations located at remote points from each other., In most of such systems it is desirable to maintain some predetermined pressure such for instanceeighty pounds` in the controlpipe 25 and connectedichambers 9 and 23, respectively, when the control valve device is in its release position and to attain' some maximum pressure;

such for instance one-hundred fifty pounds, in the control pipe when the device is operated to its full pressure position. The Vcontrol valve device embodying the invention is particularly adaptedfor use in this type of 'controll system.

Assuming Vthe control valve device is employed in a control system such as'just described. In such instancespipe 81will lead to a remote control station where suitablemeans may beprovided for operation to supply iluid under pressure to and to release fluid under pressure from pipe 8 and connected chamber 1. The control valve device will be adjusted, through the medium of the adjusting nut II'I in the manner hereinbefore described, to obtain the desired initial control pipe pressures. i I o i It will be understood from the foregoing description, that when -the control valve device is so adjusted the predetermined chosen initial pressure in thecontrol pipe and chamber 9 will cause the diaphragm 6to deiiect downwardly against the opposing'pressure of spring 64 so that the follower vI2 will be moved downwardly out of engagement with the casing and the supply and release valves will be lapped to `maintain the chosen initial pressure in `the control pipe 25. The valve deviceis now conditioned for operation manually or by uid under pressure to control the pressure of fluid in the control pipe.

From the foregoing description it will also be understood that with the control valve device conditioned as just described and chamber 'I connected to theatmosphere, by way of pipe 8 and valve means located at aremote control station, the pressure of fluid in the control pipe 25may be varied between the initial pressure and some predetermined maximum pressure by manipulation of the operating handle I 2B.

If, with the control valve device conditioned as just described, it is desired to effect operation of the control valve device by fluid under pressure from a remote control station, to increase the pressure of fluid in the control pipe 25, fluid under pressure is admitted to chamber 'I from a remote control station through pipe 8. Fluid under pressure thus supplied to chamber 'I together with spring 64 acts on diaphragm 6 in opposition to the pressure of fluid in chamber 9 and thereby thefcontrol pipe 25. Since diaphragm 6 is in a balanced condition by the pressure of iiuid in chamber 9 and theopposing pressure of spring 64, an increase in the pressure of iiuid in chamber 1 will cause the diaphragm to deflect upwardly relative to the plunger 69. As the diaphragm E is thus deflected upwardly, the diaphragm foll lower I2 andlthereby the main and pilot release valves 36vand 38, respectively, which are carried by the follower, are caused to move in the same direction'relative to the plunger S9. As a result, continued upwardmovement of the follower I2 and release valves 36'a'nd 38 acting through the medium of pilot supply valve stem unseats the pilot supply valve 19 against the opposing pressure of spring. If upward movement of follower I2 and main and pilot release valves 36 and 38 is continued, the main supply valve 'l2 will be moved out of engagement with its seat 'II `by-reason of the engagement ofv the forked end portion 36h01 the kmain release valve with the upper wall `|42 of the recessed end portion I5 of the main supply valve l2.` It will be understood that it onlxt atslghtV increase in controlpipe-pressure is desired; onlyI the pilot snpplxrv valve 1.9. will beunseated', while-if: agreater increase is: desired; the main supply? valve 1oz-will bey unseated'..

With the pilot release valve unseated', iluct un.. der' pressure flows' from bore. 10f connected supply'cham-ber. 9il past valve' 18.-v to: chamber 23 from'fwhence it flows tof chamber 9;. counterbore 61 and; control. pipe: 2:5 through the hereinbefore traced circuits.. It the mairrsupply' valve.l is4A unseated, .iluid. under 'pressure willzilow fronrbore 10 pastthe-.unsea-ted valve to: chambe1v23 ande thence tothe control pipe and4` connected; chambers.A

Thel pressure of fluid.: supplied'` to chamber' 9 acts' ondiaphr-agm B inopposition'. to the combined pressuresof control spring-B4- andthe uicl supplied` tof chamber 1f, and when; this pressure isincreased-A to; aV degree which: overcomes the combined-pressures. of the spring and uid! in chamber 1, the diaphragm will deilectdownward- 1y relative to'- the 'plunger' 6.9. AS the diaphragm 5' isA thus deflected downwardly, the diaphragm follower l2qandthereby' thev main and; pilot release-valves 3.6 and. 3.8,.respectively;.whiclrare carried by. the follower, are` caused: to' move in the same direction relative to the.' main supplyv Valve 12g and plunger 69. This permitsfthesrnain suppls7 valve if unseatedto move,v under the influence ot, the forceI of-z gravity,` into seating; engagement with .itsseat 1II and permits the.- continued: down wardmovement ot thepilot supply valve 19: relative tothemain-.valve toits seated position' on the main valve. With thesupply valve thus seatedy the supply. otuidunder pressuretothefchamber 23 iS-closedol Whensthe-.supplyf valves.- 1% and-19 seat as'. lust described; `further. flowof fluid under pressure fromf the supplyechamber 91 is closedon andY as a result downwardv movement of the diaphragm' assemblage is; stopped: by the actionf of spr-ing 64' and, thevpressurecf iiuidin. chamber 1,. thus the several parts of the-device assume their' lap po'- sition. Y

It will be understood from the: above that the pressure of fluids-in: the controll pipe 25" canb'e increased., above thief initial.- chosen pressure, in

suchi increments.- asy called.I for by the desiredl inorementsoii increase: inA controlpressure inchantber. 1. The maximume degree of pressure may be providedin. said. pipe byv providing theA maximum pressureoiluidinchamber- 1=.Y

If,` after. the controtpipe pressure hasbeen increased tosome: degree above.` thee predetermined chosenv initial. control pipe. pressure, it. is-. desired to-i'educe the pressure'of. iluid.L in theY control pipe 25,. fluid.. underY pressure. is. releasedfrom chamber 1. When-1 thepressure of!` fluid inchamber 1` actingl ori-1. the; lower face. of* diaphragm: 6 is sufciently reducedv with respect: to! they opposing force of fluid under pressure. in. chamber 9=zacting onv the opposite'face. off the diaphragm,l the diaphragm 'assemblage is caused to/move downwardly. As the diaphragm assemblage` is vthus moved downwardly, the? main and.- pilot release.- valves 35- and; 38, respectively, which arescarriediby the follower,y are causedl tofmove' in the fsamedirection relativertofthe main-` supply valve 1-2 and plunger 33; As a. result, continued downward` movement or the. diaphragm assemblagewllallow spring 4-3 to unseat the pilotv release valve 36'.. Continued downward movement ofVv the? diaphragm' assemblage andi thereby' the' main;V release valvef 36 cause?. the lower surface of the: forked portion;36h to4 engage the lower wall. or the recess T6; so: that downward movement off the main release-valve ls brought te a. stop. this: ocnurs-,. the diaphragm; assemblage andi thereby the seat'. 35 for the: main; releases valve `nieves."downwardly.-a relative to the main release valve 36 thus moving the' seat. 35s out of? engagement with the Valve.

It will. be understood thatvwiththepilot; release valve-SILY unseatedilnidaundertpressure will be! released. from@ the control pipe- 25 to the.y atmos-V pherevpast. said: vala/re;v and. thatif' the main re=t lease valve: 36' is unseated il'uid under` pressure will lne-released' from'y the control'fpipe 2li tor the atmosphere; pastsaidimain-valve atan' increased rate.4 When: the. pressure of iluid. in: the control pipe: 25: and: connected diaphragm chamber @is thus.' reduced s-uilicientlywith respect vto the com'- bined control: pressure in` chamber 1i andi the action ci' spring` B4". the latter pressureI deflectsi diapliragrnv E and thereby4 the follower" lf2. upwardly: This'- upward?-movenrentl or the diaphragm: fol'- lower moves theseata: furthe' main=releaseva1ve 36 in a direction' toward'. the.l valve until: themain release valve is seated.` after? which theama'inf-release` valvermoves'with-.tlie follower until the seaty fori thepilot' release' valve 3d carried: therebyengages the pilot valve.V Thisfseating' or the: release valvesz willfprevent further" flow otA fluid under Dressurezironr chambers 9' andf"23 andi the con nected control pipe. 25;. thereby'limiting the reduction in; pressure. therein to'y a degree corre'- sponding to the reduction in pressure inl thecontrolV uid. pressure in chamber'- 'l'.V vIt'. will' off' course be understood thatl when the release of'il'uid under` pressure.'l is.- out: oft' from. chamber 9 the'. dia'- phragm; assemblage will' come to. a stopl without unseating the. pilot' release valve 38.y so that the valvedevice is'in its lapi condition.

From. the vforegoing` it will: be understood 'that the pressure of uid: in the control pipe'- 25:-` may be increased'. or decreased in' as` many steps' or increments as desired';"the' degree of' each stop depending.v upon the" degree of" increaseV or decrease the pressure" of fluid in` chamber' 1f.

It wi'llznow be"` seen that the con-trollvalvedevice I= may be operated; either manually from alocal station by'mearrsof the'. operating handle IZt'r or by' fluid.' under pressure supplied? to and' released' from chamber' 1 through pipe 8 from'- arem'otc control: station', to vary' the pressure' of iluid' in thef controk pipe 25- between some'predtermined chosen initial pressure'- andi'af chosen. maximum pressure..

In'- 'certain' control systems it'is desirable` t'o control'the. control valve device jointly from two different control` stations'. For instance, on cer'- ta'in' airplanes powered 'by' tWoor' more engines it is desirable Whenthe speed' of the engines-fare sinmltaneously' controlled' by the pilot', that the engineerbe capableA ofi adjusting' the' speed ofione ormore' ofthe'engines' in order' to synchronize all ofthe engines; For' example, one of' these con"- trol valve' devicesl may be provided" at theA engineers control" station for controlling each engine onA the plane. The pipef may lead tothe pil'ots control station Where` suitable means, such `for instance a control' valve'device embodying the invention? adjusted' as shown in the' drawing; may be' providedE for'operation bythe pilot' to supply fluid under.' pressureit'orseveral pipes simultaneously for thereby eiectingoperation of'l the devices to simultaneously adjust" the speed of the several engines.. .Iff the` engineer` then' finds it necessary'to', eitlierlncrease or decrease the speed ot anyfon'e or more of the engines` to: bring' them into' synnhronism: with the' other' engine' orv errgin'es. he rotates the. 26 either' clockwise or counter-clockwise, as the case may be, to adjust the position of the plunger 69 relative to the main release valve 36 and thereby vary the pressure in the control pipe 25.

It will be noted that when the control valve de-l vice is adjusted for operation jointly by two operators in the manner above described, the operating handle |26 will normally be maintained in some position intermediate release and full pressure position in the variable pressure Zone s that movement of the handle in either direction will modify the position of the plunger relative to' the" i ply ofA fluid under pressure to said chamber, a spring for normally maintaining said supply valve seated, a release valve for controlling the release of uid under pressure from said chamber, ranother spring for normally maintaining 'said're lease valve unseated, said other spring being of less pressure value than said first mentioned spring. a plunger for controlling the operation Vof [said valves. subject on opposite ends toA fluid at 'chamber pressure to balance the plunger, a stem carried by saidplunger, means operable to effect Q'peration of said plunger t0 rst seat said release valve and to then unseat said supply valve.

72. In a control valve device, in combination, a chamber, a supply valve for controlling the supply lof, fluid under pressure to said chamber, a spring for normally maintaining said supply valve seated, a release valve for controlling the release of fluid under pressure from said chamber, another spring for normally maintaining said relgase valve unseated, said other spring being of less pressure value than said first mentioned spring, a plunger for controlling the operation of said valves, `said plunger being subjected at one `end to the pressure of fluid in said chamber and being subjected at the other end to the pressure of fluid in another chamber, means for maintaining the pressureof iiuid in said ychambers and acting on opposite ends of said plunger equalized,

"and means operable to eiect operation of said plunger to rst seat said release valve and to then unseat said supply valve.

3. In a control valve device, in combination, a chamber, a main supply valve, a pilot supply valve, each of said supply valves being operative to control the ilow of fluid under pressure to said chamber, a main release valve, a pilot release valve, each of said release valves being operative to control the flow of lluid under pressure from said chamber, a plunger movable axially of said main and release valves for controlling the oper,- ation of the valves, said main and said pilot supply valves being contained interiorly vof said plunger and arranged to cooperate therewith upon operation of said plunger in one direction to iirst close the main supply valve and then the pilot supply valve and `being then operative upon continued operation of said plunger in the same direction A-to first allow said pilot release valve to open and to then move said main release valveto its open position, and means operative for initiating the operation of said plunger. I

4; `In a control valve device comprising a body casing having a chamber to which fluid under pressure may be supplied and froin which lluid under pressure `may be released, in' combination,

a supply and release valve mechanisrrlv contained in said casing operable for varying the supply of fluid under pressure to and therelease of fluid under pressure from said chamber, an operating arm support casing secured to said body casing, saidsupport casing having a pivbtally connected coverportion, a rotatable shaft mounted in said arm support casing, means operatively connecting. said shaft to said supply and releasevalve mechanism, an operating arm manually operative to actuate said shaft, and meanjs for preventing undesired rotary movement ofjsaid shaft. said means comprising a spring and an adjustable nut arranged to cooperate with said pivotally con nected cover portion for loading said cover -to create frictional resistance to rotary movement of the shaft. 5,.

5. In a control valve device comprising a casing having a chamber to which :duid under pressure may be` supplied and from which iluid under pressure may be released, in combination, valve means including a supply valve and a. release valve operable to control the Isupply of fluid under pressure to and the release of fluid under pressureifrom said chamber, a regulating spring, a flexible `diaphragm subject to the opposing pressure of `said springand fluid in said chamber, said llexible diaphragm 1engaging said casing in such a manner upon anincrease inw-pressure in said chamber as to reduce the effective area of said diaphragm, aplunger associated with said supply valvey for effecting operationofsaid valve means to vary the pressure of fluid `in said chamber and thereby control the operation of said` diaphragm for effecting operation of said valve means to limit either the supply of fluid under pressure to or the release of iiuid under pressure from said chamber, and means manually operable for controlling' the operation of said plunger. i i

6.`In` a control valve device? comprising a body casing having a chambenin fcombinationg a supply and release valve mechanism contained in said` body casing and operative `for varying the supplyiof fluid under pressure to and the release of fluid under pressure from said chamber, an operating arm support casing. a shaft rotatably mounted in said support casing, a plunger eccentricallyconnected to saidshaft for operation by the shaft to .control the` operation of said valve mechanism, an arm for actuating said shaft, said support casing being adjustable to vary the position of said shaft andarmlwith relation to the body casing; and` means ,for clamping said arm support casing in any desired position to which it has been moved Without in any way alecting the control and operation of said valve mechanism.

"7. In a controlvalve device comprising a body casing having a chamber, combination, a supply andv release valve mechanism contained in said body casing and operative forvarying the supply of :luid under pressure to and the release of fluid under pressure from said chamber, an operating arm support casing containing a rotatabieshaft operative to control the operation of said valve mechanism. an arm for actuating said shaft, said support casing being adjustable to vary theposition of said arm with relation to the body casing, a nut for clamping said arm support casing rigidly. to said body .casing in` any positionv to which it has b,een.movedand means for locking said nut in its clamped position.

s 8,"In a Vcontrol valve devicey comprising a body casing having a chamber, in combination, a supply and release valve mechanism contained in said bodycasing Vand operative for 4varying the supply of fluid under pressure to and therelease of fluid under .pressure from said chamber, an operating armzsupport ycasing containing a rotatable shaft operati-ve` to Vcontrol the. operation of said valve mechanism,y an arm operatively connected to said shaft and, operable to actuate saidshaft, and a. nut having, screwthreadedengagement with said body casingzand 'engaging said support casing and operativetoclampsaid support casing to said body casing. in any chosen position lwith relation to said bodycas'in`g.. l l i A fr '9. In a 'control Valve 'device comprising a body casinghaving a chamber, in combmation, asupply and-release valvermeohanism contained in said body'fcasingandoperative for varying the supplyof luidunder pressure to andthe release of fluid under pressure from said chamber, an operatingv arm support casing, shaft 'rotatably mounted in said support casing, a plunger vslid'- ably guided in said body casingand support casing and'operative by' said V'shaft to control the operation of said valvemechanism, said plunger being operatively connected to the` shaft at a point located at one side of the axis of the shaft, and saidlsupport casing, shaft and plunger being rotatable-to :any 'chosen position 'in ay complete circle relative to-said body casing without in any way affectingthe'operationfofy any part of the device, means i'for' `clamping andlocking said support cas,- i'ng to sai-d body casing in the'ch'osen position, and an operating armifor aotuatin'g'said shaft.

f' *10i Ina selfelapping'control valve device of the type having a vcasing in which' `there is provided a uid lpressure discharge passage, the combination with al flexiblediaphragm mounted in said casing'and being arranged to flex vertically upwardly and vdownwardly'and having ljat one' side a chamber to which lfli'iid'under pressure may be supplied andffrom'whioh fluid under pressure may be released, off follower `means's'-ecured to said diaphragm 'and lhaving za" 'discharge vmessage througn'whien uuid under vpressure may be released from 'said`ch'amber, a tubularj'member rockablyl 'and sli'dably 'mounted' in saidV follower means and casing to 'vaccommodatethe vertical' movement' or said daphragni vand .thereby `the' follower means and to compensatefor vui'iwanted tilting'movement ofthe ,follower means from its vertical `x'aths of'trayel, to prevent binding' action between 'the'` parts, said member' establishing an alwaysr'op'enA communication from the second mentioned passage tothe rs't'mention'ed passage, and means 'formaintaining leakproof the joints betw'eerifsaid `tubular"mer'nber' a'nd the follower4 means and casing. 1 .k Y Y 11.111 a self-lapping controlv valve'Y device of the type having a casing in whichther is' provide'd'fa fluid 'pressure' discharge passage, 'the co'mbiiiationwitha 'flexible diaphragm mounted in saidj'casi'n'g andA being' arranged to i'iex vertically upwardly and downwardly and having at one side acnainber' to which duid under pressure may be supplied'and from which lfluid' under pressure may betre'leased, of follower means secured to said diaphragm` and 'having ya discharge passage through whichiiuid-under pressure 'may be released from saidchamber, 'a tubular member lrockably and slidablv 'mounted in saidl foupwer means and cas# ing to-accommodate the vertical movement-fof said diaphragm and therebytheffollower means and to compensate forv unwanted tiltingj :nove-l ment of the follower means fromits vertical path` of travel, to prevent binding` action between fthe parts, said member establishing an always open communication from the second mentioned passage to the first mentioned passage, and Vsealing meansV carried by said memberfor maintaining leak-proof the joints -betweensaidtubular member and the follower means vand casing, Y Y 12. In a self-lappingcntrol valve devicegof the type having a casing in which theresis provided a uid pressure discharge passage, the combination, with a flexible diaphragm mounted ,in said casing and being arrangedtoex vertically upwardly and downwardly, and having atreach side achamber to which fluid under pressure may b'e supplied and from which fluid under pressure may be released, of follower means secured to saidldiaphragm having a discharge passage through which fluid under pressure may be lreleased from one of said chambers, a tubular member disposed in the other chamber, saidmember-being rockably and slidably mounted in said follower means and casing toV accommodate the vertical movement ofsaid diaphragm and thereby the follower means and to compensate for unwanted tilting movement of the follower means from `its intended path` of travel, toprevent binding action between the parts, said member -establishing an always open communication from the second mentioned passage to the first xmentioned passage, Vand means for maintaining leak-proof the joints between said member, follower means and casing. v

v13. In a control valve device, the combination with a casing having `a chamber to which fluid under pressure may be supplied and from which uid under pressure may be released; of a spring, a movableabutment subject to the opposing pressures of said 'spring and duid in said chamber and being arranged toY ileX vertically upwardly and downwardly,v a `release valvev for releasing fluid under pressurefrom said chamber, said releasevalve being mounted in'and carried by said movable abutment, a plunger 'spaced-from and movable axially relative. to said abutment, a supply-Valvefor controlling the supply of Vllui'da under pressure .to 'said chamber, said supply valve being mounted -in and carried by said plunger in axial alignment with Asaid release valve, a lost motion connection operatively connecting said valves to*- gether and being operable to prevent binding action between the valves in the event that the movable abutment and thereby the release valve tilts from its intended vertical path of travel, and means operable to effect operation of said plunger. V1li, In a control valve` device, in combination, a chamber, a pair'of coaxially aligned valves ar, ranged to seat in the same directiomone of Vsaid vaves being arranged to control a `communication through which fluid under pressure may be supplied to said chamber'and the other being arranged to control Va communication through which fluid under pressure may be released from said chamber, a plunger movable axially of said valves having a seat for said one valve and operable upon movement into engagement with saidone valve to close the communication controlled thereby and being then operable to effect movement of said other valve to open the communication controlled thereby, a lost motion connection for operatively connecting said one valve' to saidother valve to insure against binding action between said valves in-'the event -that 'either of said 'valves asesor? tiltfrom their intended pathj of travel, and means operable to effect operation of said plunger.

A15. In a self-lapping control valve device ofthe type having acasing, the combination, with a movable abutment mounted in said casing and being arranged to move verticallyupwardly and downwardly and having at one side a chamber to which iiuld under pressure may be suppliedand fromwhich uid under pressure may be released., ofAa supply valve for controllingthe supply of iluidunder pressure to said chamber, a release valve disposed in axial alignment with said supply valve and operative to engage a seat .on said abutment to close 01T the release of fluid under pressure from said chamber, `a lost motion con'- nection for operatively connecting said valves together and arranged to prevent binding action between said valves upon operation of said abutfrom ment in the event that said abutment tilts its intended path of travel.

16. In a self-lapping control valvedevice of th type having a casing in which there is provided `a fluid pressure discharge passage, the combination, with a flexible diaphragm mounted in said casingand being arranged to ex vertically upwardly and downwardly and having. at one side a chamber to which fluid under pressure may be sup-` plied and from which fluid under pressure may be released, of follower means secured to said diaphragm havinga valve seat surrounding a Vdis-- charge passage through which fluid under pressure'may` be released from said chamber, a release valve disposed in axial alignment with said follower and adapted to engage said seat to close off the release of iluid under pressure fromsaid chamber, a supply valve arranged in axial align` ment with said release valve and operable to control the supply of fluid under pressure to said chamber, a lost motion connection for connecting said valves together to preventbinding actionbe-` tween said valves, inthe event that the follower means and release valve tilt from their intended vertical path of travel, and a tubular member rockably and slidably mounted in said follower means and said casingto accommodate the vertical movement of said diaphragm and therebyl the follower means and to compensate for un- Wantedl tilting movement of theffollower means and-diaphragm to prevent binding action between the parts in the event that the follower means anddiaphragm tilt from their intended vertical path of itravel and to establish an'always open communication from the second mentioned pas-` sage ot the first mentioned passage. z i

`17;.In4 a self-lapping control valve device of thetype having a casing in which there is providedva'fluid pressure discharge passage, the combination, with a ilexible diaphragm mounted in said casing and being arranged to flex vertically upwardly and downwardly and having at one side a. chamber to which fluid under pressure may be supplied and fromwhich iluid under pressure maybe released, of follower means secured to said diaphragm having a valve seat surrounding a discharge Vpassage through which iiuid under pressure may be released'from said chamber, a releasewalve disposed in axial alignment with said follower and adapted to engage said Aseat to close oi lthe release of fluid under pressure from said chamber, asupply valve arranged in axial alignment with said release valve and operable tdcontrol'v the supply of fluid under pressure to said chamber, a lost motionconnection for connectliig'said valves together to prevent binding action betweensaidvalves in the event that the follower means and release valve tilt fromtheir intendedvertical path of travel, a tubular member rockably andfslidably mounted in said followerl means and said casing toaccommodate'the vertical `movement of said diaphragm and thereby the follower means and to compensate for unwanted tilting movement of the follower means and diaphragm to preventgbinding action between the partsA in Athe event that the; follower meansand diaphragm tilt `from their intended vertical path of travel and to establish an always open communication from the second mentioned passage, and means for maintaining leak-proof the joints between said tubular member andthe follower means and casing.

18. In a control valve device comprising' a'casing having .a pressure chamber-to which fluid under pressure maybe supplied and from which fluid under pressure may be released, in combina--" tion, a control chamber, a movable abutment 'subL ject to pressure ofiuid insaid pressure cham-` ber andanopposing pressure in said control chamberand operative upon an increase in said opposing pressure to provide an increase in the pressure of fluid in said pressure chamber and upon a reduction in said opposing pressure to release fluid under pressure from said pressure chamber to reduce the pressure. therein, valve means including a supply valve and a release valve operable by said abutment to control the supplyY of fluid-under pressure'to and therelease of uid under pressure from said pressure chambenga plunger associated with said supply valve for also effecting operation of said valve means to vary the pressure offluid in said pressure chamberand therebycontrol the operation of said abutment for effecting operation of said valve means tolimit either the supply of iluid under pressure `toorthe release of iluid under pressure from said chamber, and means manually operative ,to actuate said plunger.

19. Ina `control Avalve device comprising a caschamber, a pipe through which fluid under pressure is supplied or released to vary the pressure of uid in said control chamber, valve means including a supply valve and a release valve operable by said abutment to control the supply of fluid under pressure to and the release of uid under pressure from said pressure chamber, a plunger associated with said supply valve for also eiiecting operation of said valve means to vary the pressure of iluidin said pressure chamber and thereby control theV operation lof said abutment for effecting operation of said valve means to limit either the supply of iluid under pressure tov or the release ofuid under pressure from the pressure chamber, and means operable to actuate said plunger;

20. In a control valve device having a pressure chamber to which iluid under pressure may be supplied and also havinga control chamber to which Afluid under pressure may Vbe supplied, a

movablevalve seat, a supply valve for engage-i ment with said valve seat, means operative man ually to movel said valve seat away from saidvalv to supply fluid under pressureto said chamber, a movable abutment subject tothe pressures of fluid in the. pressure-.and control chambers and operative upon an increase vin' the pressure of .supply fluid under pressure tosaid. chamber, a

movable 'abutment subject to the pressures of iiuid inthe pressure and control. chambers and operative upon'an. increase'inithe pressure of fluid. V'insailzlf control chamber v.to move said valve away from said valve seat to'supply fluid under pressure to said pressure chambensaidY movable abut ment being operative when the pressure of iiuid in said pressure chamber'increasesover the opposing pressure acting on the abutment for effecting movement of said valve into engagement with said valve seat, to cut-off the flow offluid to said'pressure chamber. c Y y Y u A 22. In a control valve device having a pressure `chamber to which fluid under pressure may be supplied and from which fluid under pressure may be.v releasedand also having a control chamber to which. fluid-underpressure may be supplied and from which uid: under pressure maybe released, a movable supply valve seat, a supply valve for engagement with said supply valve seat, a movable abutment subject to the opposing. pressures of uid in said pressure andcontrol chambers, a release valve seat .carried by said abutment, a release `valve for engagement with Vsaid release valve seat, and being; operatively connected with said. supply valve, and manual means operative for moving said supply valve seat away from said supply valve to supply fluid under pres-- sure to said pressure chamber', said movable abutment being responsive to an. increase in the pressure of iluid in said control chamber for moving said. supply valve away from. the supply valve seat, said manual means being' operative to'move said supply valve seat, supply valve and release valve relative to the release valve seat to release fluid under pressure from said pressure'chamber.

23. In av control valve device having a pressure chamber to which fluid under pressure may be supplied and from which fluid under pressure may be released and also having a control chamber to which uid under pressure may be supplied and from which uid under-pressure may be released, a movable supply valve seat, a supply valve for engagement with said supplyvalve seat, a movable abutment subject to the opposing pressures of iiuid in said pressure and control. cham'- bers, a release valve seatcarried by said abutment, a release valve for engagement with. said release valve seat and being operatively connected' with saidl supply valve, and manualmeans'ioperative for moving said supply valve seat away from said supply valve to supply uid. under pres-- sure to said pressure chamber, said movable abut"- ment being responsive -to an inereaseiinthepressure. of uid in said control chamber -for mov-4 ing said supply valve awayY from the supplyvalve seat, said, manual means being operativeto move said supply valve seat, supplyvalve andrelease valve relative to the release val-ve seat to release.

zov

fluid under pressure'from said pressure chamber, and said movable abutment being responsive to' the reduction inthe pressure of fluid in said pressurechamber, occasioned by the release of fluid therefrom', to move said release valve seat into engagementxwith the release valve to cu't oi the release'flow of fluid fromthe pressure chamber.

24. .In4 a control valvefV device having a'pressure chamber to whichv fluid under pressure may be supplied'and from-'which iiuid under pressure may be released and also having a control chambertof which iluid under pressure may be supplied and from which fluid under pressure may be released, a movable supply valve seat, a supply valve for engagement with said supply valve seat, almovable abutment subject to the opposing .pressures of fluid in said pressure and control chambers, a release valve seat carried by saidabutment, a release valve for,4 engagement with said release valve seat, and being operatively connected with said supply valve, said movable 'abutment being responsive to an increase in the pressure vof fluid in saidV control chamber for'moving said supply valve away from the supply valve'seat to supply fluid under pressure to said pressure chamber and being responsive to areduction in the pressure of fluid in. said control. chamber formoving said release valve seat away from said release valve to release fluidl under pressurefrom said pressure chamber, and manual meansoperative for moving said supply valve seat away from said supply valve to supply fluid under pressure to said pressure chamber and being operative: to move said supply valve seat, supply valve and release valve relative to the release valve seat to release fluid under pressure from said pressure chamber.

25. In a control valve device having a'. pressure chamber` to which. fluid under pressure vmay be suppliedaand fro-m which fluid under pressure may be released and also having a control chamber. to which uid under pressure may be suppl-ied and from Whichfluid under pressure may be released, a movable supply valve seat, a supply valve for engagement with saidv supply Valve seat,

a movable abutment subject to the opposing pres-1 sures o f fluid in said pressure and controlchambers, a release valve seat carried by said abut-. ment, ajrelease'valve for engagement with said release valve seat and being operatively connected with said supply valve, said movable abutment being responsive to an increase in the pressure of fluid in said. control chamber for moving said supply valve away from the supply valve seat to supply fluid. under pressure vto saldi pressure chamber and being responsive to a reduction in the pressure of iluidin. said control chamber for moving saidr release valve seat away from said release valve torrelease fluidunder pressure from said pressure chamber, and manual means operative for moving said supply valve seat away from said supply valve to supply fluid under pressure to said pressure chamber and being operative to move said supply valve seat,. supply valve and release valve .relative to the release valve seatto release fluidy under pressure from said pressure chamber, and said movable abutment being responsive to the reduction in the pressure ofY fluid in saidV pressure chamber, occasionedby the release of fluid therefrom, to move said release valveseat into engagement with the release valve. togcut off the release flow of. fluid from the pressure chamber.

26. In a. control valve device having a pressure chamber to which-- fluid' undery pressure may be Which'flui'd under 7.pressure may be supplied and y from which fluid under pressure' may be released, aplunger having a supplyvalve'seat, a supply valve'` for engagement with said supply valve, seat, a flexible diaphragm subject to the opposing prese sres offluidwin said pressure and control chambers, a diaphragm 'follower` carried by said diaf phragm having arelease'valve seat', a release valve for engagement with said release valve seat and being disposed in axial alignment with said supply valve, a lost motion connection for operatively connecting said supply valve and release valves together, said diaphragm being responsive to an increase inthe pressure of fluid in said control chamber for moving through the medium of said follower and said release valve said supply away from the supply valve seat on said plunger to supply fluid under pressure to said pressure chamber and being responsive to a reduction in the pressure of fluid in said control chamber for moving said follower and thereby said release valve seat away from said release valve to release fluid under pressure from said pressure chamber, and manual means operative for moving said plunger and thereby said supply valve seat away from said supply valve to supply uid under pressure to said pressure chamber and being operative to move through the medium of said plunger and thereby said supply valve seat and supply valve the release valve away from the release valve seat to release fluid under pressure from said pressure chamber.

27. In a control valve device comprising a casing having a fluid pressure discharge passage,

a fluid pressure chamber to which fluid underV pressure may be supplied and from which fluid under pressure may be released and a control chamber to which fluid under pressure may be supplied and from which fluid under pressure may be released, in combination, valve means operative to vary the pressure of fluid in said pressure chamber, manually operative means for actuating said valve means, movable abutment means subject to the opposing pressure of fluid in said pressure and control chambers and operative upon variations in the pressure of fluid in the control chamber for effecting operation of said valve means, said movable abutment means having a passage through which fluid under pressure may be released from said pressure chamber, a tubular member disposed in said control chamber, said member being rockably and slidably mounted in said abutment means and casing to compensate for unwanted tilting movement of the abutment from its intended path of travel to prevent binding action between the parts, said member establishing an always open communication from the second mentioned passage to the first mentioned and means for maintaining leak-proof the joints between said member, abutment means and casing.

28. In a self-lapping control valve device comprising a casing having formed therein two pressure chambers, a movable abutment separating said chambers and being subject to the opposing pressures of fluid in said chambers, a fluid conducting passage in said casing extending from one of said chambers through said movable abutment and through the other of said chambers and comprising a fluid conduit providing an air-tight connection within said fluid conducting passage, said fluid conduit being yieldable to the movement of said movable abutment, and

valvefineans' associated with sjaidinnovablejL` ment for 4controlling thev flo'w offluid un r' providing for the flow of fluid between said chamber and said passage, the connections between the tubular means and the movable abutment and between the tubular means and the fluid conducting means being leak-proof and `comprising means operative to compensate for unwanted movement 0f said abutment from its axial path of' travel. i

30. In a fluid pressure control device, in combination, a casing, a movable abutment in said casing having'at one side a fluid pressure control chamber, fluid conducting means having a pas- Y sage terminating in an opening at the opposite side of `said abutment, tubular means connected 'at one end to said movable abutment and at the other end to said fluid conducting means providing for the flow of fluid between said chamber and said passage, sealing means for preventing leakage past the connections between the tubular means and the movable abutment and between the tubular means and the fluid conducting means and comprising means operative to compensate for Vunwanted movement of said abutment from its axial path of travel.

31. In a self-lapping control valve device of the type having a casing in which there is provided a fluid pressure conducting passage, the combination with a. movable abutment mounted in said casingand having at one side a fluid pressure chamber of annular means establishing a communication which is open 'to said chamber and which extends through said abutment, a tubular member rockably and slidably associated with said annular means and the casing to accommodate axial movement of said movable abutment and compensate for unwanted movement of the movable abutment from its axial path of travel and thereby prevent binding action between the parts, said tubular member establishing an always open communication from said chamber to said passage and sealing means for maintaining leak-proof joints between said movable abutment, said tubular member and said casing.

32. In a control valve device, in combination, a chamber, a supply valve for controlling the supply of fluid under pressure to said chamber, a release valve for controlling the release of fluid under pressure from said` chamber, a plunger for other chamber to which fluid under pressure may be supplied from said supply chamber, a supply valve for controlling the supply of fluid to said other chamber, a release valve for controlling the release of fluid under pressure from said other chamber, a plunger operative to control the operation of said va1ves,`said plunger extending through said supply clziamlier and having one end exposed to said other chamber, a balar'ieing chamber to which the other end of said plunger is exposed, an always open conduit connecting said other chamber and said balancing chamber, a' chamber formed in said plunger always'ffopen to saidsupply chamber, a passage in said'plunger through swhich fluid under pressure flow from the chamber in said plunger and thereby from said supply chamber to'said l0 and said balancing chamber.

ARTHUR J. BENT. 

